-97.9% is the change from 808 to 17
Calculation steps:
[( 17 - 808 ) ÷ 808] x 100 = -97.9%
Formula
Percentage change = [(17 - 808) / 808] x 100
Subtract the new number by the original number
17 - 808 = -791
-791 ÷ 808 = -0.9789603960396039
-0.9789603960396039 x 100 = -97.9%